linux-kernel - Re: [PATCH 1/2] regulator: s2mps11: Use kcalloc() in s2mps11_pmic

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Date:   Sat, 15 Apr 2017 12:48:45 +0200
From:   Krzysztof Kozlowski <krzk@...nel.org>
To:     SF Markus Elfring <elfring@...rs.sourceforge.net>
Cc:     linux-samsung-soc@...r.kernel.org,
        Bartlomiej Zolnierkiewicz <b.zolnierkie@...sung.com>,
        Liam Girdwood <lgirdwood@...il.com>,
        Mark Brown <broonie@...nel.org>,
        Sangbeom Kim <sbkim73@...sung.com>,
        LKML <linux-kernel@...r.kernel.org>,
        kernel-janitors@...r.kernel.org
Subject: Re: [PATCH 1/2] regulator: s2mps11: Use kcalloc() in
 s2mps11_pmic_probe()

On Fri, Apr 14, 2017 at 11:01:25PM +0200, SF Markus Elfring wrote:
> From: Markus Elfring <elfring@...rs.sourceforge.net>
> Date: Fri, 14 Apr 2017 22:00:35 +0200
> 
> A multiplication for the size determination of a memory allocation
> indicated that an array data structure should be processed.
> Thus use the corresponding function "kcalloc".
> 
> This issue was detected by using the Coccinelle software.

Unfortunately you write mostly cryptic commit messages. This does not
answer for the main question - why this change is needed. Code looks
okay, but you should explain in simple words why this is needed.

Best regards,
Krzysztof

> 
> Signed-off-by: Markus Elfring <elfring@...rs.sourceforge.net>
> ---
>  drivers/regulator/s2mps11.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/regulator/s2mps11.c b/drivers/regulator/s2mps11.c
> index 7726b874e539..b4e588cce03d 100644
> --- a/drivers/regulator/s2mps11.c
> +++ b/drivers/regulator/s2mps11.c
> @@ -1162,7 +1162,7 @@ static int s2mps11_pmic_probe(struct platform_device *pdev)
>  		}
>  	}
>  
> -	rdata = kzalloc(sizeof(*rdata) * rdev_num, GFP_KERNEL);
> +	rdata = kcalloc(rdev_num, sizeof(*rdata), GFP_KERNEL);
>  	if (!rdata)
>  		return -ENOMEM;
>  
> -- 
> 2.12.2
>